METHOD OF DETERMINING COORDINATES OF A RADIO-FREQUENCY SOURCE FROM AN AIRCRAFT BOARD USING A TRI-ORTHOGONAL ANTENNA SYSTEM Russian patent published in 2020 - IPC G01S1/08 

FIELD: radio engineering; electronics.

SUBSTANCE: invention relates to radio engineering and can be used in radio monitoring systems when solving the problem of hidden determination of radio-frequency source (RFS) coordinates under conditions of a priori uncertainty relative to polarization and spatial parameters of radio signals, noise and interference, when restrictions on overall dimensions of direction-finding antenna system are imposed, in particular for determination of coordinates of radio-frequency source from aircraft board. Method is based on CTOAS measurement of orthogonal components E_x1, E_y1, E_z1 and E_x2, E_y2, E_z2 vectors of electric field intensity and as well as orthogonal components H_x1, H_y1, H_z1 and H_x2, H_y2, H_z2 vectors of magnetic field intensity and at different points of spacecraft location space at moments of time t₁ and t₂, determining orientation of vectors , and in space, constructing auxiliary planes Ω_E1, Ω_E2, Ω_H1 and Ω_H2, construction of the RFS position lines ɭ₁ and ɭ₂ at intersection of auxiliary planes Ω_E1, Ω_H1 and Ω_E2, Ω_H2 respectively, calculating coordinates of radio-frequency sources at the intersection of lines of position of radio-frequency source ɭ₁ and ɭ₂.

EFFECT: high accuracy of determining coordinates of radio-frequency sources based on use of a combined tri-orthogonal antenna system (CTOAS), consisting of three antenna elements in form of asymmetrical dipole-type dipoles and three frame antenna elements.

1 cl, 12 dwg